Oven.



' 2. E. GARLSGN.

OVEN.

APPLICATION. FILED DEC. 4, 1913.

Patented F870" 16, 1915.

2 SHEETS-SHEET 1.

77? IN VENTOR.

oi Sfiredenb/r E. Carlson:

WITNESSES.- 1 AM" 4% m AM A TTORNEY.

F. E. OARL$0N.

OVEN.

APPLIGATION FILED D1304, 1913.

div-w a Patented Feb. 16, 1915.

Z SHEETS-SHEET 2.

IN VENTOR. flederick E Carlson.-

m1. ATTORNEY.

till

anti onmp 1:

u t: ah CLARK, nncrrour. I

015 "NEW BRITAIN, CONNECTICUT, A CORPORATION 0F CON- UVEN.

specification of Letters Patent.

original teem net flugust r, isle, flerial no. ream. Divided and anapplication filed December a, ma Serial no. 80t,6t0.

eral mechanical. construction of the body of the oven, and withadditional features of construction which will be more particularlypointed out in the following specification.

The invention is illustrated in its adaptation to use in an electricoven.

In the drawings liigure 1 is a front view of an oven embodying myinvention. Fig. 2 is a sectional view on the line 2 2 or e ne s a respee-Yew of the oven with apart of oneside wall broken away. Fig. 4L is adetail, viewof the door construction; Fig. 5 is a sectional view on theline 5 5 of Fig. l. ltig, 6 is a detail view showing the construction ofthe main body of the oven.

Referrin first to the mechanical constrnction o the oven, the mainbody'ofthe oven, comprising the sides a, b, and the back c, is adouble-walled structure formed preferably from a single sheet of thinstock of proper width, which is folded about a form to the proper shapethe ends of the strip being united by an interlocking seam as at d.Sheets of asbestos e are laid against the inner faces of these walls,and then spacers f are inserted. to revent colla se. The top and bottomare ormed by fitting within the walls of the body dished plates g, It,having at their side and rear edges channeled lateral flanges g, h,forming pockets 9, k into which the top'and bottom edges of the innerwall of the body fit, the edges of the flanges abutting against theouter wall of the body.

The ends of the sides, a, b, and the fronts of the dished plates g, h,form'the door opening in the front of the oven. These dished platesarelined with sheet asbestos,

' and then receive spacers f and are inclosed till by cover plates 2'',h, the edges of which are bent down as indicated at a", k, to cover.

over the joints between the body and the top and bottom. Corner plates Zfinish the top, and the feet at are located at thecorhere of the bottom.Tie rods a pass through the cover plate a, the dished plates 9, h, thecover plate Is, and the feet m, and have nuts threaded to their lowerends, by means of which the parts of the oven are bound to' prises adeeply channeled member s of rec-- tangular form, having edge flanges,about which the edges of a flnished plate a are folded, forming aledgeabout the inner margin of the frame, on. which -the. panel at of sometransparent material, as glass, maybe supported, held in place by theangle 'strips'w whichare secured by the clips a which en-- gage theadjacentiends oftwo of the angle strips. It is desirable to hold thepanel sere y i P a e. and th s rs.v en a e e. an begstrip's rather thanthe material of the panel and so avoid damaging it.

The door members of the hinges are formed integrally with the doorstructure by rplling over the muckles s from the "edge of the. channeledmember s. The door construction is of sheet metal andisvery stifl',preventing sagging or warping, and the knuckles formed integrally withthe frame make a very rigid hinge support. The pivoted door latch w hasa slotted end which engages a headed pin w secured in the end of theside wall a, and the slotted end is twistedslightly to have a cannningaction on the pin to cause the door to be tightly shut and its flangesto lie closely against the edges of the door opening to prevent theescape of heat from the interior of the oven. Tf desired, a device whichl[ have called a receptor, indicated at l, may be used as the centraloffset portion, raised slightly above the floor which permits the metalto move under expansion and contraction without occasioning the snappingwhich is objectionable in structures of this sort.

Of course the main body of the oven could be made from more than asingle piece of metal, though a small number is preferable. I am alsoaware that the structureflhere shown and described is susceptible ofmodifi-- cation and change without departing from the spirit of theinvention as set forth in the appended claims. I

This application is a division of my application serially numbered 783,47 5 filed August 7, 1913. 3

I claim as my invention:

1. In a device of the character described, a three-sided, double-walledstructure formed from sheet metal bent to shape and constituting thesides and back of the main oven body, double-walled top and bottommembers fitted to the top and bottom ofthe main body, the inner walls ofsaid top and bottom members fitting within the walls of the main body,spacing the said walls from one another, laterally extending flanges onthe inner walls of the top and bottom members overlying the spacebetween the walls of the main body member, tie rods at the cornersbinding said body between saidflanges, the front oftsaid oven body beingformed by the ends of the sides of the main body and by the edges of thetop and bottom members, and a door closing the opening in the front ofsaidoven, hinged to-the end of lateralflanges thereon engaging andspacin the, walls of the sides and. back at top an bottom, cover platesfor the top and bottom members, flanges thereon embracing the upper andlower edges of the body, and means for securing said cover plates andbody together.

3. An oven, the main body of which, comprising the sides and back, is aspaced double-walled structure formed from sheet metal bent to shape andwith its meeting edges secured together, recessed top and bottom memberssnugly fitting within the inner walls of the sides and back, and withtheir front edges flush with the ends of the sides, lateral flangesthereon engaging and spacing the walls v of the sides and back at topand bottom, cover plates forthe top and bottom members, flanges thereonembracing the upper and lower edges of the body, and tie rods at thecorners uniting said cover plates and binding said body between them.'

FREDERICK E. CARLSON. Witnesses ARTHUR '1. Evans, Jnssn J. Fosrnn.

